Ado, I always renew my Rx at the online site. When an Rx runs out of refills, I still order online, and Medco contacts the doc's office for approval. I don't have to do anything else. I get prescriptions from three doctors, and all of them are very good about responding to Medco. I rarely have to do anything but click a few times on their web site.
If I have any complaint at all, it's that they send me an e-mail to let me know when an Rx is available for renewal, but they will only identify it by Rx number - not by the name of the medicine (those @#$$% privacy things). I can never find the number on the bottle, so the e-mails are worthless to me. I just delete them. And when I get down to about 2 weeks left on my 90-day supply, I go online and reorder. If the prescription doesn't need to be okayed by the doctor, I usually get the pills within a week. I have it all charged to one particular credit card that I don't use for anything else - and they do that automatically.